Near-field beamforming divides the space directly in front of the microphone array into a 64x64x64 grid of 5cm voxels, and can locate a sound source in that 3d space ... The demo here was to ...

Enter the Ossic X 3D audio headphones. They're not just for VR ... I experienced this firsthand in the HTC Vive's "Secret Room" demo, from Valve's The Lab. It drops you into the titular location ...